/*

 * Copyright (C) 2026 Arthur SC Chan

 *

 * Copyright (C) secunet Security Networks AG

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License as published by the

 * Free Software Foundation; either version 2 of the License, or (at your

 * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.

 *

 * This program is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY

 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * for more details.

 */

#include <daemon.h>

#include <library.h>

#include <encoding/message.h>

int LLVMFuzzerInitialize(int *argc, char ***argv)

{

  dbg_default_set_level(-1);

  library_init(NULL, "fuzz_ike");

  libcharon_init();

  return 0;

}

int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len)

{

  message_t *message;

  packet_t *packet;

  /* Minimum IKE header size for fuzzing meaningful IKE headers effectively */

  if (len < 28)

  {

    return 0;

  }

  /* Create packet from fuzzer input */

  packet = packet_create_from_data(host_create_from_string("192.0.2.1", 500),

                   host_create_from_string("192.0.2.2", 500),

                   chunk_clone(chunk_create((u_char*)buf, len)));

  if (!packet)

  {

    return 0;

  }

  /* Fuzz IKE message parsing and processing */

  message = message_create_from_packet(packet);

  if (message)

  {

    if (message->parse_header(message) == SUCCESS)

    {

      message->parse_body(message, NULL);

    }

    message->destroy(message);

  }

  return 0;

}